Function updateSourceMap

src/index.ts:1689–1695

* Update the source map contents for improved output.

(sourceMapText: string, fileName: string)

 * Update the source map contents for improved output.
 */
function updateSourceMap(sourceMapText: string, fileName: string) {
  const sourceMap = JSON.parse(sourceMapText);
  sourceMap.file = fileName;
  sourceMap.sources = [fileName];
  delete sourceMap.sourceRoot;
  return JSON.stringify(sourceMap);
}

/**
 * Filter diagnostics.